Scoop adjustment for carry-type scrapers



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SCOOP ADJUSTMENT FOR CARRY-TYPE SCRAPERS 4 Sheejts-Sheet 1 Filed March 50, 1948 INVENTOR. ghe/14o 11K/1oz,

mm E 99@ E www@ En@ mu l .l n

llii Mui Troie/Vey.

Dec. l5, 1953 H. D. KADZ SCOOP ADJUSTMENT FOR CARRY-TYPE SCRAPERS 4 Sheets-Sheet 2 Filed March 30, 1948 INVENTOR. gle/mo D KAQZ,

A Trae/VEY.

Dec. 15, 1953 H, D, KADZ 2,662,312

SCOOP ADJUSTMENT FOR CARRY-TYPE SCRAPERS Filed March 30, 1948 4 Sheets-Sheet 3 L E 40A. 1 j; /W .6. 47- 34 47 49 49 43,* 4a

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, INVENTOR. ARQ/4.40 @.Kloz,

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Dec. 15, 1953 H. D. KADz SCOOP ADJUSTMENT FOR CARRY-TYPE SCRAPERS Filed March so, 194s 4 Sheets-Sheet 4 IN V EN TOR. EQQALD D. dlfmz',

Arrow/Ex Patented ec. 15, 1953 Harald D. Kaflz, Glendale, Calif., assignor to Kay- Brunner Steel Products, Inc., a corporation of Delaware Application March 30, 1948,` Serial No. 17,980

7 Claims.

My invention relates to carrying scrapers having a bowl mounted to occupy loading, carrying and dumping positions, and an apron for partly or completely closing the mouth of the bowl. Particularly, although not necessarily, my invention relates to light duty two wheel carrying Scrapers.

It is a purpose of my invention to provide a carrying scraper in which the bowl is so mounted in the frame structure of the scraper-as to swing to up and down positions therein, and to be urged to a down position so that when the scraping blade of the bowl is in digging or scraping contact with the ground the force exerted rearwardly thereagainst under forward movement of the scraper, can be employed to swing the bowl to up position to elect dumping of the earth therefrom. Thus it eliminates the use of any mechanisms, such as hydraulic rams or cables, for moving the bowl to either up or down position.

, Another purpose of my invention is the provision in a carrying scraper of a frame structure having frames relatively movable to occupy a lowered position and various raised positions not only to vary the vertical position of the bowl for loading and carrying, but for controlling the depth of spread of the earth when the bowl is in dumping position.

A further purpose of my invention is the provision in a carrying scraper of a mechanism for raising the frames to various heights, and an apron actuating means operable by such mechanism.

I will describe only one form of carrying scraper embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawings:

Fig. 1 is a view showing in fragmentary plan one form of two wheel carrying scraper embodying my invention.

Fig. 2 is a view showing the scraper in side elevation with the frames thereof adjusted to slightly lower the bowl and leaving the apron slightly elevated to partly open the mouth of the bowl and thus allow earth to be discharged therefrom in limited quantities for spreading over a considerable area of ground.

Fig. 3 is a central longitudinal sectional view of the scraper showing the frames lowered so that the bowl is in earth loading position, and the apron elevated.

Fig. 4 is a View similar to Fig. 3 showing frames elevated so that the bowl is in earth carrying' position, and the apron closed.

Fig, 4a is a view similar to Fig. 4 showing the frames lowered and the bowl in dumping position.

Fig. 5 is a view similar to Fig. 4a showing the bowl in dumping position, and frames raised to maximum height.

Fig. 6 is an enlarged rear elevational view of the mechanism for operating the latches.

. Fig. '7 is an enlarged vertical sectional view showing the upper latch and the parts adjacent thereto, and how it engages the keeper on the bowl.

Fig. 8 is a sectional view taken on the line 8 3 of Fig. '7.

Having specic reference to the drawings, my invention in its present embodiment comprises, a

' frame structure which is made up of a rear frame F having a pair of side members i5 rigidly connected by a cross member l5 which may be of tubular construction, and a front frame FI comprising a pair of side members l'l connected at their forward ends by a cross member I8 to which is secured a forwardly extending tongue or draft bar I9 provided with a coupler 19a for connecting itto the rear end of a tractor and having a longitudinal pivot lsb and a transverse pivot Isc. yhe rear ends of the side frame members l5 are supported on wheels 29, while their forward ends are connected to the rear ends of the side members ll of the front frame by transverse pivots 2 l.

This pivotal connection between the two frames F and Fl allows their confronting ends to occupy the lowered position shown in Fig. 3, or the raised position shown in Fig. 4, it being understood that the rear frame can swing vertically about the wheels 26, while the front frame can swing vertically about the pivot l9c to occupy either of these two positions.

Two arms 22 are fixed to the upper edges of the frame members Il just forwardly of the pivots 2i, and these arms extend upwardly and rearwardly to the rear of the pivots 2l. Two other arms 23 are fixed to the upper edges of the frame members l 5 just rearwardly of the pivots 2|, and these arms extend upwardly and forwardly of these pivots. A third pair of arms 24 is fixed to the upper edges of the frame members Il adjacent the cross member i8, and these members rise substantially vertically to provide mountings for sheaves as will be described hereinafter.

A bowl E is made up of sides 25, a back 2&3, and a bottom 2l, with a scraping blade 23 at the forward edge of the bottom which extends forwardly and downwardly in the usual manner. The bowl is supported for swinging movement to up and down positions .within the frames F and FI by means of apair of links 29, and in such manner that the bowl is urged to a down position which, according as the frames are lowered or raised, causes the bowl to occupy a loading position as shown in Fig. 3. or a carrying position as in Fig. 4. The upper ends of the links are pivotally connected to the arms 23 as at 30, while the lower ends are pivotally connected to the sides 25 of the bowl as indicated at 3| It will be noted that the pivots 39 are positioned substantially directly above the pivots 2|, and that the pivots 3| are adjacent the lower forward corners of the bowl sides. t is by connecting the links to the arms 23 and to the bowl sides 25 in this manner that the bowl tends to occupy a down position in the frames, and in which position the bowl is in loading position or carrying position depending upon the positions of the frames F and Fl. From this down position the bowl can swing to the up position shown in Fig. 5 in which the earth content thereof can be dumped. p

For limitingI the bowl B to swinging movement to these two up and down positions, and also for securing the bowl in either of these positions, the following mechanism is provided: A keeper 32 in the form of a roller is mounted on a bracket 33 secured centrally to the lower rear corner of the bowl, and this roller under swinging movement of the bowl is movable in a tubular standard 34, the bracket 39 extending through a slot 35 in the forward side of the standard. The standard has a portion welded to the cross member I6 which is curved on a radius having as its center the pivots 36. This curved portion merges into a straight portion which extends to a suitable height above the rear frame where its upper end is provided with a stop 36 that limits upward movement of the keeper and, hence, upward swinging movement of the bowl about the pivots 36. Downward swinging movement of the bowl about the pivots 3i! is limited by a stop 31 secured on the back of the bowl to engage the stop 35. Thus the up and down positions of the bowl are positively deiined.

As best shown in Fig. 6 the mechanism includes an upper latch bolt 38 adapted to be engaged by the keeper 32 for holding the bowl in the up or dumping position, and a lower latch bolt 39 which the keeper engages to hold the bowl in its down position. These latches 38 and 39 are axially movable in sleeves 40 and 4|, respectively, secured to the standard 34 adjacent the ends of the latter. By means of springs 42, the latch bolts are urged into the path of movement of the keeper 32, and the bills of the bolts are reversely beveled as at 33a andr39a, so that a' the keeper in its movement upwardly or downwardly in the standard will retract the bolts to allow the keeper to pass, and be held by the respective bolt against downward or upward movement to hold the bowl in its up or down position.

The springs 42 at one end are connected to ears 43 on the sleeves 49 and 4| and at the other end to two links 44. These links at their ends are pivo'tally connected to the outer ends of the latch bolts 38 and 39 so that when moved rearwardly they operate to simultaneously retract both latch bolts out of engagement with the keeper, whether the latter is in an up position or a down position. Rearward movement of the links is limited by stops 45 on brackets 46 secured to the sleeves 40 and 4|.

To move the links 44 rearwardly for retracting the latches, I provide an operating lever L having a fork 41 pivoted as at 48 on ears 49 xed to the standard 34, and pivoted as at to the link. At its upper end the lever has a cable 5| connected thereto which is adapted to extend forwardly to the tractor for actuation by the operator on the tractor. Manifestly, when pulling on the `cable the lever will be swung in a clockwise direction about its pivot 48 to move the links rearwardly and retract the latch bolts against the tension of the springs. As shown in Fig. 6, the cross member |6 is provided with a reinforcing flange 52 which is recessed as at 53 to accommodate the links 44.

My scraper also includes the usual apron A for partly or fully closing the mouth of the bowl B. The side arms 54 thereof which are situated at the outer sides oi' the bowl, are pivoted on stub axles 55 in the upper ends of the arms 22. Mounted on these same stub axles are sheaves 56 about which cables 51 are trained. One end of these cables are anchored to the upper ends of the arms 23, and the other ends to studs 58 xed on opposite sides of the apron. BetweenA the sheaves 56 and the studs the cables are trained over sheaves 59 on the upper ends of the arms 24.

Rotatably fitted on the axles 55 are sleeves 60 xed on the forward ends of a pair of piston rods 6| operating in cylinders 62 pivoted at their rear ends as at 63 on ears 64 fixed to the side frame members |5. These rods, pistons and cylinders constitute a pair of hydraulic rams designated generally at R, and to the lower ends of the cylinders of which pressure fluid is adapted to be supplied through hoses 65. While not shown it will be understood that these hoses extend forwardly to the tractor where suitable valves are provided to supply fluid pressure from a source to the rams for forcing the rods 6| forwardly to the position shown in Fig. 4, or to allow the fluid to exhaust from the cylinders and thus permit the rods to move rearwardly to the position shown in Fig. 3.

The aforedescribed cables and sheaves, and the rams R provide a means for actuating the apron A, as well as a means for raisingand lowering the frames F and F| With no iiuid pressure in the rams the weight of the bowl and apron causes the frames to occupy lowered position, wherein the bowl is lowered to a loading position leaving the apron in an open position to permit loading (see Fig. 3). Upon supplying fluid pressure to the rams the rods 6| are actuated to exert a force forwardly and upwardly on the arms 22 to raise the frames F and Fl, and at the same time move the sheaves 56 toward'l the sheaves 59 thereby lengthening the effective length of the cables 5l to cause lowering of the apron (see Fig. 4). Whether the apron closes the mouth of the bowl depends upon the relative positions of theglatter and the frames Fand FI, for as shown in Fig. 2 the frames are not completely raised, and, hence, the apron notcompletely lowered so that the bowl although elevated for carrying, its mouth is partly open tov allow earth to be discharged in limited quantities for spreading over the ground.

In operation of the scraper, and with the parts thereof in the positions shown in Fig. 3, forward movement of the scraper causes the blade 28 to have scraping or digging engagement with the ground, and thus earth is caused to ow into the bowl. Once the bowl becomes loaded the operator supplies pressure fluid to the cylinders 62 forcing the piston rods el forwardiy to lift the arms 22 and thereby raise the frames to the position acacia shown in Fig. 4. With such elevation of the frames the bowl is lifted to the carrying position shown in Fig. and the sheaves 5t advanced to lengthen cables 5l and lower the apron A to closed position at the mouth of the bowl.

When desiring to dump the earth from the bowl, the operator rst pulls on the cable 5l to move the lower latch 3S free of the keeper 32 and release the bowl, and then actuates the valves to allow nid to exhaust from the cylinders, thus permitting the confronting frame ends to drop to lowered position, and actuating the cables 5'! to lift the apron to partly open position, With lowering of the frames the blade 28 is brought into scraping or digging contact with the ground so that under continued forward movement of the scraper a force is exerted rearwardly against the blade to swing the now-released bowl about the axis 3D rearwardly and upwardly to the dumping position shown in Fig. 4a. Upon the bowl swinging to this position, which is limited by the stop 3E, the keeper 22 passes to the upper side of the latch 33 where it is held thereby to secure the bowl in dumping position.

ln dumping it is desirable to spread the earth to various degrees of depth depending upon the existing ground grading or filling requirements. Thus after the bowl has been forced to dumping position the operator can, through operating the rams R, lift the frames E and Fl from their lowered position to any preselected height within the limits which their pivotal connection affords, and hold the frames at that height. As the bowl raises with the frames the blade 28 is likewise raised to a height corresponding to the upward adjustment of the frames. As the blade does the actual spreading of the earth, its height of adjustment determines the depth of the earth as spread, and thus any ground grading or filling requirement can be met.

Once the bowl has been emptied it may be returned to a position for reloading by first raising the frames to their upper limit of adjustment, if not already so raised, and then actuating the latch 33 to disengage the keeper 32 and release the bowl whereupon, because of the manner in which the bowl is pivotally mounted, it will of itself swing baci: to normal position in which it is automatically secured by the lower latch 3S. Now by lowering the frames through bleeding the rains of fluid, the bowl is lowered to cause the blade 2t to have scraping or digging engagement with the ground, so that under forward movement of the scraper the bowl can be again loaded with earth.

Although I have herein shown and described only one form of carrying scraper embodying my invention, it is to be understood that various changes and modifications may be made therein Without departing from the spirit of my invention and the spirit and scope of the appended claims.

I claim:

l. In a carrying scraper, a front frame adapted for connection with a tractor, a rear frame having wheels supporting the rear` end thereof and being pivoted at its forward end to the rear end of the front frame, arms on the front frame extending upwardly and rearwardly therefrom, arms on the rear frame extending upwardly and forwardly so as to intersect the arms on the front frame, fluid pressure responsive means connected to the rear frame and to the arms on the front frame for raising and lowering the confronting ends of said frames, a bowl having a scraping blade thereon, links pivoted to the arms on the rear frame and depending therefrom with their lower end pivoted to the bowl so as to support the bowl within said frames for bodily movement therewith as well as for tilting movement relative thereto; and a latch for securing said bowl against tilting movement whereby said bowl will be caused to occupy a carrying position or a loading position in which said blade has scraping contact with the ground, according as the confronting ends of said frames are raised or lowered by said fluid pressure responsive means, and wherein when said latch is operated to release said bowl when in loading position, the force exerted rearwardly on said blade by the ground under forward movement of the bowl, will operate to tilt the bowl into a dumping position.

2. In a carrying scraper, a front frame adapted for connection with a tractor, a rear frame having wheels supporting the rear end thereof and being pivoted at its forward end to the rear end of the front frame, arms on the front frame extending upwardly and rearwardly therefrom, arms on the rear frame extending upwardly and forwardly so as to intersect the arms on the front frame, uid pressure responsive means connected to the rear frame and to the arms on the front frame for raising and lowering the confronting ends of said frames, a bowl having a scraping blade thereon, links pivoted to the arms on the rear frame at a point which is above and substantially in alignment with the pivotal connection of the confronting ends of the frame, pivot means connecting said links with said bowl adjacent the forward portion of the bowl whereby the bowl is suspended by said links between said frames for bodily movement up and down with said frames and for tilting movement relative to said frames, and latch means for releasably holding said bowl against tilting movement.

3. In a carrying scraper, a front frame adapted for connection with a tractor, a rear frame having wheels supporting the rear end thereof and being pivoted at its forward end to the rear end of the front frame, arms on the front frame extending upwardly and rearwardly therefrom, arms on the rear frame extending upwardly and forwardly so as to intersect the arms on the front frame, fluid pressure responsive means connected to the rear frame and to the arms on the front frame for raising and lowering the confronting ends of said frames, a bowl having a scraping blade thereon, links pivoted to the arms on the rear frame at a point which is above and substantially in alignment with the pivotal connection of the confronting ends of the frame, pivot means connecting said links with said bowl adjacent the forward portion of the bowl whereby the bowl is suspended by said links between said frames for bodily movement up and down with said frames and for tilting movement relative to said frames, latch means for releasably holding said bowl against tilting movement, an apron pivoted on the arms carried by said front frame, and cables and pulleys associated with said frames and the apron for raising and lowering the apron responsive to the raising and lowering of the said confronting ends of said frames.

4. In a carrying scraper, a front frame adapted for connection with a tractor, a rear frame, wheels supporting the rear end of the rear frame, pivot means connecting the front end of the rear frame with the rear end of the front frame, arms 0n the front frame extending upwardly therefrom, hydraulic rams connected to the rear frame and to said arms for raising and lowering the confronting ends of said frames, other arms on said rear frame extending upwardly therefrom, a bowl having a scraping blade thereon, and means for tiltably suspending said bowl from the arms on the rear frame including links pivoted at certain corresponding ends to said arms on the rear frame at points above and substantially in hne with the pivot means connecting said frames, and a pivotal connection between the other ends of said arms and the bowl located at points forwardly of the pivot means for connecting said frames, and latch means for releasably holding the bowl against tilting movement.

5. In a carrying scraper, a front frame adapted for connection with a tractor, a rear frame, wheels supporting the rear end oi the rear frame, pivot means connecting the front end of the rear frame with the rear end of the front frame, arms on the front frame extending upwardly therefrom, hydraulic rams connected to the rear frame and to said arms for raising and lowering the confronting ends of said frames, other arms on said rear frame extending upwardly therefrom, a bowl having a scraping blade thereon, and means for tiltably suspending said bowl from the arms on the rear trame including links pivoted at certain corresponding ends to said arms on the rear frame at points above and substantially in line with the pivot means connecting said frames, and a pivotal connection between the other ends of said arms and the bowl located at points forwardly of the pivot means for connecting'said frames, and latch means for releasably holding the bowl against tilting movement, including a bracket xed to and extending rearwardly from said bowl, a roller on the outer end of said bracket, an upright guide standard fixed on said rear frame at a point rearwardly of the bowl and on which said roller is guided when the bowl. is tilted, spring-loaded latch members adjacent upper and lower ends of said standard for latching Contact with said roller, and means for moving said latch members out of latching relation to said roller.

'6. In a carrying scraper: a frame structure; a bowl; means for tiltably suspending the bowl on the frame structure to occupy up and down positions; a keeper on the bowl, rectilinear latches on the frame structure positioned and operable to engage the keeper for securing the bowl in either up position or down position; links connecting the latches to each other; springs connected to the links and to the frame structure for urging the latches into engagement with the keeper; and a lever pivoted on the frame structure and operatively connected to said links to move the links against the tension of the springs for retracting the latches out of engagement with the keeper.

7. In a carrying scraper: a frame structure; means for tiltably suspending the bowl on the frame structure to occupy up and down positions; a channeled standard fixed upright on the frame structure at the rear of the bowl; a bracket xed to the rear of the bowl and movable lengthwise in the standard; spaced rollers mounted on the bracket within the standard; sleeves xed to the standard at different elevations thereon; latch bolts movable in the sleeves to engage the bracket between the rollers; links connecting said bolts; springs connected to the links and the standard for urging said bolts through the links into the path of movement of the bracket; and a lever pivoted on the standard and operatively connected to said links to move the links against the urging action of the springs for retracting the bolts out of the path of movement of the bracket.

HARALD D. KADZ.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 463,571 Brooks et al Nov. 17, 1891 1,427,693 Miskin Aug. 29, 1922 2,008,178 Harrison July 16, 1935 2,168,319 Brodersen et al. Aug. 8, 1939 2,301,516 Brodersen Nov. 10, 1942 2,332,686 Austin et al. Oct. 26, 1943 2,361,914 Brodersen Nov. 7, 1944 2,445,260 Brimhall July 13, 1948 2,458,274 Kadz Jan. 4, 1949 2,525,846 Wilson Oct. 17, 1950 

